CN213983867U

CN213983867U - Multi-cold-source conversion device for data machine room

Info

Publication number: CN213983867U
Application number: CN202120028277.0U
Authority: CN
Inventors: 杨振杰; 单华海
Original assignee: Shandong Tongxiang Intelligent Technology Co ltd
Current assignee: Shandong Tongxiang Intelligent Technology Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-08-17
Anticipated expiration: 2031-01-06

Abstract

The utility model provides a many cold sources conversion equipment of data computer lab, it is equipped with refrigerator, cooling tower and plate heat exchanger. When the refrigerating machine supplies cold, the evaporator, the chilled water supply pipe, the load device, the chilled water return pipe and the first water pump form a circulating refrigeration loop, and the refrigerating machine supplies cold for the load device to reduce the temperature. When the refrigerating machine and the plate heat exchanger jointly supply cold, the evaporator, the chilled water supply pipe, the load device, the chilled water return pipe, the first water pump and the plate heat exchanger form a circulation loop, and the plate heat exchanger and the refrigerating machine simultaneously supply cold for the load device and reduce the temperature. When the plate heat exchanger supplies cold, the plate heat exchanger, the chilled water return pipe, the chilled water supply pipe, the load device and the first water pump form a circulation loop, and the plate heat exchanger supplies cold for the load device to cool. The whole device is also provided with a third water pump and a confluence three-way valve, so that the effective operation of the refrigerator is guaranteed, and the smooth transition is realized by the cold supply of the refrigerator, the combined cold supply of the refrigerator and the plate heat exchanger and the free cold supply of the plate heat exchanger.

Description

Multi-cold-source conversion device for data machine room

Technical Field

The utility model relates to a refrigeration technology field, in particular to many cold sources conversion equipment of data computer lab.

Background

The data machine room is provided with data processing, storage and network communication equipment which runs 24 hours all the year around, such as an electronic computer system, a server, a communication system and the like, the equipment has large heat productivity, the temperature in the data machine room is increased, uninterrupted cooling all the year around is needed to ensure the normal running of the equipment, and the cooling system is required to have extremely high reliability and relatively low energy consumption.

In order to ensure that the PUE of the data room is low enough, the project address of the existing refrigeration system of the data room is generally selected at a position with better natural resources, so that a free cooling technology can be fully used. The data machine room refrigerating system utilizing the free cold supply technology generally has three working conditions, namely, independent cold supply of the refrigerator, simultaneous cold supply of the refrigerator and the plate heat exchanger, and complete free cold supply of the plate heat exchanger.

However, the switching of the existing cooling system between different working conditions cannot be realized, or smooth realization cannot be realized, the temperature of the load device is greatly affected in the switching process, most projects abandon the use of free cooling because smooth realization cannot be realized, or two independent cooling systems respectively realize the functions of refrigerating machine cooling and free cooling. The reason for the unavailability is that the cooling water temperature cannot meet the internal requirements of the refrigerator in the switching process, so that the refrigerator is abnormally stopped and cannot be loaded, and even in the process of waiting for the start or stop of the refrigerator, the temperature of a data machine room of the load device rises due to unstable operation of the system.

Disclosure of Invention

The utility model aims at solving the not enough of above-mentioned technique, provide a many cold sources conversion equipment of data computer lab, can realize that the refrigerator supplies cold alone, refrigerator and plate heat exchanger jointly supply cold, plate heat exchanger is the smooth transition between free cooling alone, can not lead to the refrigerator unusual.

For this, the utility model provides a many cold sources conversion equipment of data computer lab, it is equipped with the refrigerator, the cooling tower, plate heat exchanger and load device, the refrigerator includes evaporimeter and condenser, the evaporimeter can supply cold alone for load device, the cooling tower also can supply cold alone for load device through plate heat exchanger, the evaporimeter can also jointly supply cold for load device with plate heat exchanger, the condenser still is equipped with the circulation cooling unit, at the refrigerator cooling, the refrigerator jointly supplies cold with plate heat exchanger, make entire system accomplish smooth transition when switching over between the free cooling of plate heat exchanger.

Preferably, the two ends of the evaporator are respectively communicated and connected with the load device through a chilled water supply pipe and a chilled water return pipe, the chilled water return pipe is sequentially provided with a first water pump, a first electric valve and a third electric valve, the chilled water supply pipe and the chilled water return pipe are further provided with a fourth electric valve through pipeline communication, and a connecting point of the pipeline where the fourth electric valve is located and the chilled water return pipe is arranged between the first electric valve and the third electric valve. The cooling tower is communicated with the condenser through a cooling tower water outlet pipe and a cooling tower water inlet pipe, the cooling tower water outlet pipe is sequentially provided with a second water pump, a fifth electric valve and a seventh electric valve, the cooling tower water outlet pipe and the cooling tower water inlet pipe are further provided with an eighth electric valve through pipeline communication, and a connecting point of the pipeline where the eighth electric valve is located and the cooling tower water outlet pipe is arranged between the fifth electric valve and the seventh electric valve.

The two ends of a cold side channel of the plate heat exchanger are respectively communicated with a cooling tower water outlet pipe through a heat exchanger primary side water inlet pipe and a heat exchanger primary side water outlet pipe, the heat exchanger primary side water inlet pipe is provided with a sixth electric valve, a connection point of the heat exchanger primary side water inlet pipe and the cooling tower water outlet pipe is arranged between the second water pump and the fifth electric valve, and a connection point of the heat exchanger primary side water outlet pipe and the cooling tower water outlet pipe is arranged between the fifth electric valve and the seventh electric valve. The two ends of a hot side channel of the plate type heat exchanger are respectively communicated with a chilled water return pipe through a heat exchanger secondary side water inlet pipe and a heat exchanger secondary side water outlet pipe, the heat exchanger secondary side water inlet pipe is provided with a second electric valve, a connecting point of the heat exchanger secondary side water inlet pipe and the chilled water return pipe is arranged between a first water pump and a first electric valve, and a connecting point of the heat exchanger secondary side water outlet pipe and the chilled water return pipe is arranged between the first electric valve and a third electric valve.

The circulating cooling unit comprises a third water pump and a confluence three-way valve, a cooling tower water outlet pipe and a cooling tower water inlet pipe are communicated and connected with the confluence three-way valve through pipelines, an A port of the confluence three-way valve is communicated with a cooling tower water outlet pipe through a pipeline, a connection point of the pipeline where the A port of the confluence three-way valve is located and the cooling tower water outlet pipe is arranged between the fifth electric valve and the seventh electric valve and behind a connection point of the pipeline where the eighth electric valve is located and the cooling tower water outlet pipe; the AB port of the confluence three-way valve is also communicated with the water outlet pipe of the cooling tower through a pipeline, the pipeline where the AB port of the confluence three-way valve is positioned is also communicated with a third water pump, and the connection point of the pipeline where the AB port of the confluence three-way valve is positioned and the water outlet pipe of the cooling tower is arranged behind a seventh electric valve; and the B port of the confluence three-way valve is communicated with the cooling tower water inlet pipe through a pipeline, and the connection point of the pipeline where the B port of the confluence three-way valve is located and the cooling tower water inlet pipe is arranged in front of the connection point of the pipeline where the eighth electric valve is located and the cooling tower water inlet pipe.

Preferably, when the refrigerator supplies cold, the evaporator, the chilled water supply pipe, the load device, the chilled water return pipe and the first water pump form a circulation loop; and the cooling tower, the cooling tower water outlet pipe, the second water pump, the condenser and the cooling tower water inlet pipe form a circulation loop.

Preferably, when the refrigerator and the plate heat exchanger are used for combined cooling, the evaporator, the chilled water supply pipe, the load device, the chilled water return pipe, the first water pump and the plate heat exchanger form a circulation loop; a circulating loop is formed by the cooling tower, the cooling tower water outlet pipe, the second water pump, the plate heat exchanger and the cooling tower water inlet pipe; the condenser and the third water pump form a circulation loop.

Preferably, when the plate heat exchanger is used for free cooling, the plate heat exchanger, the chilled water return pipe, the chilled water supply pipe, the load device and the first water pump form a circulation loop; and the cooling tower, the cooling tower water outlet pipe, the second water pump, the plate heat exchanger and the cooling tower water inlet pipe form a circulation loop.

Preferably, the pipeline where the AB port of the confluence three-way valve is located is also communicated with a one-way valve, and the one-way valve is arranged behind the third water pump.

Preferably, one end of the cooling tower water inlet pipe, which is close to the condenser, is further provided with a temperature sensor, and the temperature sensor is arranged in front of a connection point of a pipeline where the port B of the confluence three-way valve is located and the cooling tower water inlet pipe.

The utility model provides a many cold sources conversion equipment of data computer lab has following beneficial effect:

the utility model discloses be equipped with third water pump and confluence three-way valve, when the system at the refrigerator cooling, the combined cooling of refrigerator and plate heat exchanger, when switching over between the independent free cooling of plate heat exchanger, third water pump and condenser form circulation circuit, satisfy the cooling requirement of condenser, guarantee the effective operation of refrigerator, can not be because of the low temperature water of cooling tower suddenly gets into the condenser, cause the refrigerator to shut down unusually, lead to load device data computer lab temperature rise's the condition to appear even, the refrigerator cooling has been realized, the combined cooling of refrigerator and plate heat exchanger, smooth transition between the free cooling of plate heat exchanger. When the water temperature in the circulation loop formed by the third water pump and the condenser is not enough to cool the condenser, the confluence three-way valve is adjusted to enable the low-temperature water output from the cooling tower to enter the circulation loop formed by the third water pump and the condenser until the normal operation requirement of the refrigerator is met.

In the middle of the whole device operation process, stable transition is realized through conversion between different working conditions every time, the refrigerator effectively operates or stops working, the temperature of the load device is not influenced, stable and continuous production is guaranteed, the production efficiency is improved, meanwhile, a free cold source is fully utilized, the service time of the free cold source is prolonged to the maximum extent, and the production energy consumption and the PUE of a data machine room are reduced.

In the actual operation process, the data statistical data machine room can save energy consumption by 25-50% in winter by adopting the technology, and the production cost of enterprises is reduced while the sustainable development requirement is met.

Drawings

FIG. 1 is a schematic structural diagram of a circulation loop for cooling a refrigerator according to the present invention;

FIG. 2 is a schematic structural diagram of a circulation loop when the combined cooling of the refrigerator and the plate heat exchanger is performed;

FIG. 3 is a schematic structural diagram of a circulation loop when the plate heat exchanger of the present invention is used for free independent cooling;

FIG. 4 is a schematic structural diagram of a circulation loop when the converging three-way valve is adjusted in the combined cooling process of the refrigerator and the plate heat exchanger;

fig. 5 is a schematic structural diagram of the circulation loop when the refrigerator is switched to separate cooling by the combined cooling of the refrigerator and the plate heat exchanger.

The labels in the figure are: 1. the system comprises an evaporator, 11 parts of a chilled water supply pipe, 12 parts of a chilled water return pipe, 121 parts of a first water pump, 122 parts of a first electric valve, 123 parts of a third electric valve, 124 parts of a fourth electric valve, 2 parts of a condenser, 3 parts of a cooling tower, 31 parts of a cooling tower water outlet pipe, 311 parts of a second water pump, 312 parts of a fifth electric valve, 313 parts of a seventh electric valve, 314 parts of an eighth electric valve, 32 parts of a cooling tower water inlet pipe, 321 parts of a temperature sensor, 4 parts of a load device, 5 parts of a plate heat exchanger, 51 parts of a heat exchanger primary side water inlet pipe, 511 parts of a sixth electric valve, 52 parts of a heat exchanger primary side water outlet pipe, 53 parts of a heat exchanger secondary side water inlet pipe, 531 parts of a second electric valve, 54 parts of a heat exchanger secondary side water outlet pipe, 55 parts of a confluence three-way valve, 56 parts of a third water pump and 57 parts of a one-way valve.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments to assist understanding of the invention. The method used in the utility model is a conventional method if no special regulation is provided; the raw materials and the apparatus used are, unless otherwise specified, conventional commercially available products.

Shown by fig. 1, the utility model provides a many cold sources conversion equipment of data computer lab, it is equipped with the refrigerator, cooling tower 3, plate heat exchanger 5 and load device 4, the refrigerator includes evaporimeter 1 and condenser 2, evaporimeter 1 can be for load device 4 independent cooling, cooling tower 3 also can be for load device 4 independent cooling through plate heat exchanger 5, evaporimeter 1 can also jointly give load device 4 cooling with plate heat exchanger 5, condenser 2 still is equipped with the circulation cooling unit, the refrigerator cooling, the refrigerator jointly supplies cold with plate heat exchanger 5, make entire system accomplish smooth transition when switching over between the plate heat exchanger 5 free cooling.

Further, two ends of the evaporator 1 are respectively connected with the load device 4 through a chilled water supply pipe 11 and a chilled water return pipe 12 to form a circulation loop. The chilled water return pipe 12 is sequentially provided with a first water pump 121, a first electric valve 122 and a third electric valve 123, the chilled water supply pipe 11 and the chilled water return pipe 12 are further provided with a fourth electric valve 124 through pipeline communication, a connection point of a pipeline where the fourth electric valve 124 is located and the chilled water return pipe 12 is arranged between the first electric valve 122 and the third electric valve 123, and a pipeline where the fourth electric valve 124 is located and a pipeline where the evaporator 1 is located are connected in parallel, so that the communication and the disconnection of the evaporator 1 can be controlled conveniently. The cooling tower 3 is communicated and connected with the condenser 2 through a cooling tower water outlet pipe 31 and a cooling tower water inlet pipe 32 to form a circulation loop. The cooling tower water outlet pipe 31 is sequentially provided with a second water pump 311, a fifth electric valve 312 and a seventh electric valve 313, the cooling tower water outlet pipe 31 and the cooling tower water inlet pipe 32 are further provided with an eighth electric valve 314 through pipeline communication, a connection point of a pipeline where the eighth electric valve 314 is located and the cooling tower water outlet pipe 31 is arranged between the fifth electric valve 312 and the seventh electric valve 313, and a pipeline where the eighth electric valve 314 is located is connected in parallel with a pipeline where the condenser 2 is located, so that the communication and the disconnection of the condenser 2 are controlled conveniently.

Two ends of the cold side channel of the plate heat exchanger 5 are respectively communicated and connected with the cooling tower water outlet pipe 31 through a heat exchanger primary side water inlet pipe 51 and a heat exchanger primary side water outlet pipe 52 to form a circulation loop. The sixth electric valve 511 is arranged on the heat exchanger primary side water inlet pipe 51, the connection point of the heat exchanger primary side water inlet pipe 51 and the cooling tower water outlet pipe 31 is arranged between the second water pump 311 and the fifth electric valve 312, and the connection point of the heat exchanger primary side water outlet pipe 52 and the cooling tower water outlet pipe 31 is arranged between the fifth electric valve 312 and the seventh electric valve 313 and is arranged in front of the connection point of the pipeline where the eighth electric valve 314 is located and the cooling tower water outlet pipe 31. The pipeline of the sixth electric valve 511 is connected in parallel with the pipeline of the fifth electric valve 312, so as to control the opening and closing of the cold side channel of the plate heat exchanger 5. Two ends of a hot side channel of the plate type heat exchanger 5 are respectively communicated and connected with the chilled water return pipe 12 through a heat exchanger secondary side water inlet pipe 53 and a heat exchanger secondary side water outlet pipe 54 to form a circulation loop. The heat exchanger secondary side water inlet pipe 53 is provided with a second electric valve 531, the connection point of the heat exchanger secondary side water inlet pipe 53 and the chilled water return pipe 12 is arranged between the first water pump 121 and the first electric valve 122, the connection point of the heat exchanger secondary side water outlet pipe 54 and the chilled water return pipe 12 is arranged between the first electric valve 122 and the third electric valve 123, and is arranged in front of the connection point of the pipeline where the fourth electric valve 124 is arranged and the chilled water return pipe 12. The pipeline where the second electric valve 531 is located is connected in parallel with the pipeline where the first electric valve 122 is located, so as to control the opening and closing of the hot side passage of the plate heat exchanger 5.

The circulating cooling unit comprises a third water pump 56 and a confluence three-way valve 55, a cooling tower water outlet pipe 31 and a cooling tower water inlet pipe 32 are communicated and connected with the confluence three-way valve 55 through pipelines, a port A of the confluence three-way valve 55 is communicated with the cooling tower water outlet pipe 31 through a pipeline, and a connection point of the pipeline where the port A of the confluence three-way valve 55 is located and the cooling tower water outlet pipe 31 is arranged between the fifth electric valve 312 and the seventh electric valve 313 and behind a connection point of the pipeline where the eighth electric valve 314 is located and the cooling tower water outlet pipe 31. The AB port of the confluence three-way valve 55 is also communicated with the cooling tower water outlet pipe 31 through a pipeline, the pipeline where the AB port of the confluence three-way valve 55 is located is also communicated with a third water pump 56, and the connection point of the pipeline where the AB port of the confluence three-way valve 55 is located and the cooling tower water outlet pipe 31 is arranged behind the seventh electric valve 313, namely between the seventh electric valve 313 and the condenser 2. The B port of the confluence three-way valve 55 is communicated with the cooling tower inlet pipe 32 through a pipeline, and the connection point of the pipeline where the B port of the confluence three-way valve 55 is located and the cooling tower inlet pipe 32 is arranged in front of the connection point of the pipeline where the eighth electric valve 314 is located and the cooling tower inlet pipe 32.

When the refrigerator is cooling, the first electric valve 122 and the third electric valve 123 on the freezing side are opened, the second electric valve 531 and the fourth electric valve 124 are closed, and the evaporator 1, the chilled water supply pipe 11, the load device 4, the chilled water return pipe 12, and the first water pump 121 form a circulation circuit. The chilled water is cooled by the evaporator 1 under the action of the first water pump 121, then cooled and cooled by the load device 4 along the chilled water supply pipe 11, and returns to the evaporator 1 along the chilled water return pipe 12 for cooling again. The fifth electric valve 312 and the seventh electric valve 313 on the cooling side are opened, the sixth electric valve 511 and the eighth electric valve 314 are closed, and the cooling tower 3, the cooling tower water outlet pipe 31, the second water pump 311, the condenser 2 and the cooling tower water inlet pipe 32 form a circulation loop. The cooling water is cooled down to the condenser 2 along the cooling tower water outlet pipe 31 under the action of the second water pump 311, and then returns to the cooling tower 3 along the cooling tower water inlet pipe 32, so that the effective operation of the refrigerator is ensured.

As shown in fig. 2 and 4, when the refrigerator and the plate heat exchanger 5 jointly supply cold, the second electric valve 531 and the third electric valve 123 on the freezing side are opened, the first electric valve 122 and the fourth electric valve 124 are closed, and the evaporator 1, the chilled water supply pipe 11, the load device 4, the chilled water return pipe 12, the first water pump 121, the heat exchanger secondary side water inlet pipe 53, the plate heat exchanger 5, and the heat exchanger secondary side water outlet pipe 54 form a circulation loop. The chilled water is cooled by the cold side of the plate heat exchanger 5 under the action of the first water pump 121 and then enters the evaporator 1 along the chilled water return pipe 12, and is cooled again by the evaporator 1 and then cools the load device 4 along the chilled water supply pipe 11. The sixth motor-operated valve 511 and the eighth motor-operated valve 314 on the cooling side are opened, the fifth motor-operated valve 312 and the seventh motor-operated valve 313 are closed, the B end and the AB end of the merging three-way valve 55 are communicated, and the a end and the AB end are closed. The cooling tower 3, the cooling tower water outlet pipe 31, the second water pump 311, the heat exchanger primary side water inlet pipe 51, the plate heat exchanger 5, the heat exchanger primary side water outlet pipe 52 and the cooling tower water inlet pipe 32 form a circulation loop, cooling water enters the plate heat exchanger 5 along the cooling tower water outlet pipe 31 and the heat exchanger primary side water inlet pipe 51 under the action of the second water pump 311, the cooling water in the heat exchanger secondary side water inlet pipe 53 is cooled, and the cooling water returns to the cooling tower 3 along the heat exchanger primary side water outlet pipe 52 and the cooling tower water inlet pipe 32 to complete circulation. The condenser 2 and the third water pump 56 form a circulation loop, water in the pipeline forms circulation under the action of the third water pump 56 to cool the condenser 2, the internal requirements of the refrigerator are met, and the effective operation of the refrigerator is guaranteed.

Compare current device, the low-temperature cooling water in the cooling tower 3 does not pass through condenser 2 and directly gets back to cooling tower 3 along cooling tower inlet tube 32, so condenser 2 can not cause the refrigerator to shut down unusually, can't load because the low-temperature water in the cooling tower 3 suddenly gets into, even because the unstable condition that leads to load device 4 data computer lab temperature to rise of system operation appears. When the temperature of the water in the circulation loop formed by the condenser 2 and the third water pump 56 is too high and is not enough to cool the condenser 2, the confluence three-way valve 55 is adjusted to close the end B and the end AB of the confluence three-way valve 55 by a certain opening degree, and the end A and the end AB are opened by a certain opening degree, so that the low-temperature cooling water in the cooling tower water outlet pipe 31 enters the circulation loop formed by the condenser 2 and the third water pump 56 to cool the condenser 2. When the water temperature in the circulation loop formed by the condenser 2 and the third water pump 56 meets the cooling requirement of the condenser 2, the end a and the end AB of the confluence three-way valve 55 are closed, and the end B and the end AB are fully opened, so that the normal operation is performed.

As shown in fig. 3, when the plate heat exchanger 5 is used for free cooling alone, the first electric valve 122 and the third electric valve 123 on the freezing side are closed, and the second electric valve 531 and the fourth electric valve 124 are opened; the fifth motor-operated valve 312 and the seventh motor-operated valve 313 on the cooling side are closed, the sixth motor-operated valve 511 and the eighth motor-operated valve 314 are opened, the B end and the AB end of the merging three-way valve 55 are communicated, and the a end and the AB end are closed. Freezing side: the heat exchanger secondary side water inlet pipe 53, the plate type heat exchanger 5, the heat exchanger secondary side water outlet pipe 54, the chilled water return pipe 12, the chilled water supply pipe 11, the load device 4 and the first water pump 121 form a circulation loop. Cooling side: the cooling tower 3, the cooling tower water outlet pipe 31, the second water pump 311, the heat exchanger primary side water inlet pipe 51, the plate heat exchanger 5, the heat exchanger primary side water outlet pipe 52 and the cooling tower water inlet pipe 32 form a circulation loop. The cooling water in the cooling tower 3 enters the plate heat exchanger 5 along the cooling tower water outlet pipe 31 and the heat exchanger primary side water inlet pipe 51 under the action of the second water pump 311, and the cooling water in the heat exchanger secondary side water inlet pipe 53 is cooled and then returns to the cooling tower 3 along the heat exchanger primary side water outlet pipe 52 and the cooling tower water inlet pipe 32. After the chilled water in the secondary side water inlet pipe 53 of the heat exchanger is cooled, the load device 4 is cooled along the secondary side water outlet pipe 54 of the heat exchanger, the chilled water return pipe 12 and the chilled water supply pipe 11 under the action of the first water pump 121, and independent free cooling of the plate heat exchanger 5 is realized.

Further, a one-way valve 57 is further communicated with a pipeline where the AB port of the confluence three-way valve 55 is located, the one-way valve 57 is arranged behind the third water pump 56, and the one-way valve 57 and the third water pump are opened and closed in a consistent manner. The one-way valve 57 is arranged to control the connection and disconnection of the condenser 2 and the circulation loop of the third water pump 56, so that the phenomenon that when the plate heat exchanger 5 is cooled alone, cooling water enters the circulation loop formed by the third water pump 56 and the condenser 2 to enable the third water pump 56 to idle, and energy waste is caused is avoided.

Further, a temperature sensor 321 is further disposed at one end of the cooling tower inlet pipe 32 close to the condenser 2, and the temperature sensor 321 is disposed in front of a connection point of a pipeline where the B port of the confluence three-way valve 55 is located and the cooling tower inlet pipe 32. The temperature sensor 321 is disposed to detect the water temperature in the circulation loop formed by the condenser 2 and the third water pump 56, and control the opening and closing direction of the confluence three-way valve 55, so that the water temperature in the circulation loop formed by the condenser 2 and the third water pump 56 meets the operation requirement of the refrigerator.

The utility model discloses a working process does:

when the outdoor temperature is high and the cooling tower 3 is not enough to cool the load device 4, the load device 4 is cooled by the refrigerator. At this time, the first motor-operated valve 122 and the third motor-operated valve 123 on the freezing side are opened, the second motor-operated valve 531 and the fourth motor-operated valve 124 are closed, and the evaporator 1, the chilled water supply pipe 11, the load device 4, the chilled water return pipe 12, and the first water pump 121 form a circulation circuit. The chilled water is cooled by the evaporator 1 under the action of the first water pump 121, and then the load device 4 is cooled by circulating cooling. And the fifth electric valve 312 and the seventh electric valve 313 on the cooling side are opened, the sixth electric valve 511 and the eighth electric valve 314 are closed, the check valve 57 is closed, the end B and the end AB of the confluence three-way valve 55 are communicated, the end a and the end AB are closed, and the cooling tower 3, the cooling tower water outlet pipe 31, the second water pump 311, the condenser 2 and the cooling tower water inlet pipe 32 form a circulation loop. The cooling water circularly cools the condenser 2 under the action of the second water pump 311, and the effective operation of the refrigerator is ensured.

When the outdoor temperature is reduced and the temperature of the output water in the outlet pipe 31 of the cooling tower is lower than the temperature in the chilled water return pipe 12, the first electric valve 122 is closed on the freezing side, the second electric valve 531 is opened, the fifth electric valve 312 and the seventh electric valve 313 are closed on the cooling side, the sixth electric valve 511 and the eighth electric valve 314 are opened, the check valve 57 is opened at the same time, and the third water pump 56 is started. The chilled water on the freezing side is cooled by the cooling water in the cooling tower 3 through the plate heat exchanger 5 under the action of the first water pump 121, and then is cooled by the evaporator 1 to supply cold to the load device 4. On the cooling side, the cooling tower 3, the cooling tower water outlet pipe 31, the second water pump 311, the heat exchanger primary side water inlet pipe 51, the plate heat exchanger 5, the heat exchanger primary side water outlet pipe 52 and the cooling tower water inlet pipe 32 form a circulation loop, and cooling water in the cooling tower 3 refrigerates and cools the chilled water on the freezing side through the plate heat exchanger 5. In order to ensure the effective operation of the refrigerator, the third water pump 56 and the condenser 2 form a circulation loop through pipelines to ensure the normal operation of the refrigerator. In the process, when the temperature sensor 321 detects that the temperature of the water in the circulation loop formed by the condenser 2 and the third water pump 56 is too high and is not enough to cool the condenser 2, the merging three-way valve 55 is adjusted to close the end B and the end AB of the merging three-way valve 55 by a certain opening degree, and open the end a and the end AB by a certain opening degree, so that the low-temperature cooling water in the cooling tower water outlet pipe 31 enters the circulation loop formed by the condenser 2 and the third water pump 56. When the temperature sensor 321 detects that the water temperature in the circulation loop formed by the condenser 2 and the third water pump 56 meets the cooling requirement of the condenser 2, the confluence three-way valve 55 is adjusted again, so that the end A of the confluence three-way valve 55 is disconnected with the end AB, and the end B is communicated with the end AB, so that the cooling water circulates and the normal operation of the refrigerator is ensured. The third water pump 56 and the converging three-way valve 55 are arranged, so that the condenser 2 and the third water pump 56 form an independent circulation loop, and the condition that the refrigerator is abnormally stopped and cannot be loaded or even the temperature of the data machine room of the load device 4 rises when the cold supply of the refrigerator is switched to the combined cold supply of the refrigerator and the plate heat exchanger 5, namely the low-temperature water in the cooling tower 3 suddenly enters the condenser 2, is avoided, and the smooth transition from the cold supply of the refrigerator to the combined cold supply of the refrigerator and the plate heat exchanger 5 is realized. And the third water pump 56 and the confluence three-way valve 55 are arranged, so that the lift of the second water pump 311 is reduced, and the energy consumption of the device is indirectly reduced.

When the outdoor temperature is further reduced and the temperature of the output water in the water outlet pipe 31 of the cooling tower is lower than the temperature of the water in the chilled water supply pipe 11, the refrigerating machine is closed, and the whole system operates as usual. After the refrigerator is completely unloaded and stopped, the third electric valve 123 is closed on the freezing side, the fourth electric valve 124 is opened, the third water pump 56 and the check valve 57 are closed on the cooling side, and smooth transition from combined cooling of the refrigerator and the plate heat exchanger 5 to independent cooling of the plate heat exchanger 5 is completed. At the moment, cooling water in the cooling tower 3 completely supplies cold for the load device 4 to reduce temperature, so that energy is saved, consumption is reduced, and meanwhile, the continuous and effective operation of the whole system is ensured.

When the outdoor temperature rises, the temperature of the output water in the water outlet pipe 31 of the cooling tower is higher than the temperature in the chilled water supply pipe 11 and lower than the temperature in the chilled water return pipe 12, and the cooling water in the cooling tower 3 is insufficient to supply cold and reduce temperature to the load device 4 alone. At this time, the fourth electric valve 124 is closed on the freezing side, the third electric valve 123 is opened, the check valve 57 and the third water pump 56 are opened on the cooling side, and then the refrigerator is opened to work, so that smooth transition from the independent cooling of the plate heat exchanger 5 to the combined cooling of the refrigerator and the plate heat exchanger 5 is realized. In the operation process of the device, the opening degree of the confluence three-way valve 55 is adjusted according to the normal operation requirement of the refrigerator, so as to meet the cooling requirement of the condenser 2 and ensure that a circulation loop formed by the condenser 2 and the third water pump 56 operates normally.

As shown in fig. 5, when the outdoor temperature further increases and the temperature of the output water in the outlet pipe 31 of the cooling tower is not lower than the temperature in the chilled water return pipe 12, the second electric valve 531 is closed on the cooling side, the first electric valve 122 is opened, the sixth electric valve 511 is closed on the cooling side, and the fifth electric valve 312 is opened. In the process of continuing the operation of the system, the temperature of the cooling water in the circulation loop formed by the condenser 2 and the third water pump 56 is adjusted by the confluence three-way valve 55, so as to ensure the normal operation of the refrigerator. When the temperature of the output water of the cooling tower 3 meets the cooling requirement of the condenser 2, the eighth electric valve 314, the one-way valve 57 and the third water pump 56 are closed, and the seventh electric valve 313 is opened, so that the final switching from the combined cooling of the refrigerator and the plate heat exchanger 5 to the independent cooling of the refrigerator is realized.

In the middle of the whole device operation process, the conversion transition between different working conditions every time, the circulating cooling unit all operates, the cooling requirement of the condenser 2 is met, low-temperature cooling water in the cooling tower 3 does not pass through the condenser 2 but directly returns to the cooling tower 3 along the cooling tower water inlet pipe 32, so the condenser 2 can not cause abnormal shutdown and loading of the refrigerating machine because the low-temperature cooling water in the cooling tower 3 suddenly enters, and even the condition that the temperature of the data machine room of the load device 4 rises is caused. The utility model discloses a steady transition between the different work condition, the refrigerator is effective operation, and does not have the temperature to load device 4 to produce influence and undulant, has guaranteed that the stability of production goes on in succession, has improved production efficiency, simultaneously abundant utilization free cold source, furthest's extension free cold source's live time has reduced the production energy consumption.

In the actual operation process, the data statistical data machine room can save energy consumption by 25-50% in winter by adopting the technology, and the production cost of enterprises is reduced.

In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The utility model provides a many cold sources conversion equipment of data computer lab, its characterized in that, it is equipped with refrigerator, cooling tower, plate heat exchanger and load device, the refrigerator includes evaporimeter and condenser, the evaporimeter can give load device is the cooling alone, the cooling tower also can pass through plate heat exchanger gives load device is the cooling alone, the evaporimeter can also with plate heat exchanger jointly gives load device is the cooling, the condenser still is equipped with the circulation cooling unit, makes entire system accomplish smooth transition when switching between refrigerator cooling, refrigerator and plate heat exchanger jointly cooling, the free cooling of plate heat exchanger.

2. The multi-cold-source conversion device of the data machine room of claim 1, wherein two ends of the evaporator are respectively connected to the load device through a chilled water supply pipe and a chilled water return pipe, the chilled water return pipe is sequentially provided with a first water pump, a first electric valve and a third electric valve, the chilled water supply pipe and the chilled water return pipe are further provided with a fourth electric valve through pipeline communication, and a connection point between a pipeline where the fourth electric valve is located and the chilled water return pipe is located and the first electric valve and the third electric valve; the cooling tower is communicated and connected with the condenser through a cooling tower water outlet pipe and a cooling tower water inlet pipe, the cooling tower water outlet pipe is sequentially provided with a second water pump, a fifth electric valve and a seventh electric valve, the cooling tower water outlet pipe and the cooling tower water inlet pipe are also communicated and provided with an eighth electric valve through a pipeline, and a connecting point of the pipeline where the eighth electric valve is located and the cooling tower water outlet pipe is arranged between the fifth electric valve and the seventh electric valve;

the two ends of the cold side channel of the plate heat exchanger are respectively communicated and connected with the cooling tower water outlet pipe through a heat exchanger primary side water inlet pipe and a heat exchanger primary side water outlet pipe, the heat exchanger primary side water inlet pipe is provided with a sixth electric valve, the connection point of the heat exchanger primary side water inlet pipe and the cooling tower water outlet pipe is arranged between the second water pump and the fifth electric valve, and the connection point of the heat exchanger primary side water outlet pipe and the cooling tower water outlet pipe is arranged between the fifth electric valve and the seventh electric valve; the two ends of a hot side channel of the plate type heat exchanger are respectively communicated and connected with the chilled water return pipe through a heat exchanger secondary side water inlet pipe and a heat exchanger secondary side water outlet pipe, the heat exchanger secondary side water inlet pipe is provided with a second electric valve, a connection point of the heat exchanger secondary side water inlet pipe and the chilled water return pipe is arranged between the first water pump and the first electric valve, and a connection point of the heat exchanger secondary side water outlet pipe and the chilled water return pipe is arranged between the first electric valve and the third electric valve;

the circulating cooling unit comprises a third water pump and a confluence three-way valve, the cooling tower water outlet pipe and the cooling tower water inlet pipe are communicated and connected with the confluence three-way valve through a pipeline, the port A of the confluence three-way valve is communicated with the cooling tower water outlet pipe through a pipeline, the connection point of the pipeline of the port A of the confluence three-way valve and the cooling tower water outlet pipe is arranged between the fifth electric valve and the seventh electric valve and is arranged behind the connection point of the pipeline of the eighth electric valve and the cooling tower water outlet pipe, the port AB of the confluence three-way valve is also communicated and connected with the cooling tower water outlet pipe through a pipeline, the pipeline of the port AB of the confluence three-way valve is also communicated and provided with the third water pump, and the connection point of the pipeline of the port AB of the confluence three-way valve and the cooling tower water outlet pipe is arranged behind the seventh electric valve, and the B port of the confluence three-way valve is communicated with the cooling tower water inlet pipe through a pipeline, and the connection point of the pipeline where the B port of the confluence three-way valve is located and the cooling tower water inlet pipe is arranged in front of the connection point of the pipeline where the eighth electric valve is located and the cooling tower water inlet pipe.

3. The multi-cold-source conversion device of the data room of claim 2, wherein when the refrigerator is used for cooling, the evaporator, the chilled water supply pipe, the load device, the chilled water return pipe and the first water pump form a circulation loop; and the cooling tower, the cooling tower water outlet pipe, the second water pump, the condenser and the cooling tower water inlet pipe form a circulation loop.

4. The multi-cold-source conversion device of the data room of claim 2, wherein when the refrigerator and the plate heat exchanger jointly supply cold, the evaporator, the chilled water supply pipe, the load device, the chilled water return pipe, the first water pump and the plate heat exchanger form a circulation loop; the cooling tower, the cooling tower water outlet pipe, the second water pump, the plate heat exchanger and the cooling tower water inlet pipe form a circulation loop; the condenser and the third water pump form a circulation loop.

5. The multi-cold-source conversion device of the data room of claim 2, wherein when the plate heat exchanger is free to supply cold, the plate heat exchanger, the chilled water return pipe, the chilled water supply pipe, the load device, and the first water pump form a circulation loop; and the cooling tower, the cooling tower water outlet pipe, the second water pump, the plate heat exchanger and the cooling tower water inlet pipe form a circulation loop.

6. The multi-cold-source conversion device of the data room of claim 2, wherein a one-way valve is further communicated with a pipeline where the AB port of the confluence three-way valve is located, and the one-way valve is arranged behind the third water pump.

7. The multi-cold-source conversion device for the data room of claim 2, wherein a temperature sensor is further disposed at one end of the cooling tower water inlet pipe close to the condenser, and the temperature sensor is disposed in front of a connection point of a pipeline where the B port of the confluence three-way valve is located and the cooling tower water inlet pipe.